There are a handful of cars out there that come with standard three-prong power outlets built-in. You probably don’t have one. It’s a pain because you have to buy all new chargers to power up your phones and tablets in the car, and you can’t charge your laptop at all… unless you pick up one of this 150w car power inverter , and it adds one three-prong outlet as well as two 1A&2.1A USB power ports to your ride. http://www.hengyeda.com/150w-aluminum-alloy-shell-car-power-inverter-dc-12v-best-inverter-to-ac-110v-car-power-inverter-with-dual-usb-3-1a-2/.html 150W modify sine wave inverter load 300w drill testing video: https://www.youtube.com/watch?v=NGu3bLXB1Ek 150W car power inverter charge mobile phone https://www.youtube.com/watch?v=k8jxYVDQ_Ik Here are some more details from the product page: Premium 150w car power inverter with 2 USB ports and AC outlets. Dual USB ports can charge most phones and tablets simultaneously (Max 3.1A total output), while AC outlets g...